Phase boundary of θ phase of solid oxygen in ultrahigh magnetic fields
Phase boundary of θ phase of solid oxygen in ultrahigh magnetic fields
复制标题
超高磁场中固氧θ相的相界
DOI：
10.1103/physrevb.92.064109
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
T. C. Kobayashi
中科院分区：
文献类型：
--
作者：
T. Nomura;Y. H. Matsuda;S. Takeyama;A. Matsuo;K. Kindo;T. C. Kobayashi
通过磁化强度和磁透射率的测量，揭示了固态氧在磁场-温度（）平面内的相图。固体氧的高场相，我们称之为相，是在低于42 K的温度下诱导产生的。在相变点和相变点处的相变场几乎与温度无关，相界非常陡峭.这一相界表明，与零场熵驱动的相变相反，在和相变处熵变很小。我们认为，该阶段不同于高温阶段的熵，分子的旋转在该阶段被抑制，而在该阶段被允许。这一发现巩固了该阶段的新奇。
The phase diagram of solid oxygen in the magnetic-field-temperature () plane is revealed by magnetization and magnetotransmission measurements. The high-field phase of solid oxygen, which we term thephase, is induced at the temperature below 42 K. The transition fields at theandtransitions are almost temperature independent, with the phase boundary being very steep. This phase boundary indicates that the entropy change is very small at theandtransitions, in contrast to the entropy-driventransition at zero field. We argue that thephase differs from the high-temperaturephase in terms of entropy; the molecular rotation is inhibited in thephase, whereas permitted in thephase. This finding consolidates the novelty of thephase.